diff --git a/src/mod/directories/mod_ldap/Makefile b/src/mod/directories/mod_ldap/Makefile
index 397305de4f..d8c5b9e4f1 100644
--- a/src/mod/directories/mod_ldap/Makefile
+++ b/src/mod/directories/mod_ldap/Makefile
@@ -8,7 +8,8 @@ LIBLBERLA=$(LDAP_DIR)/libraries/liblber/liblber.la
 
 LOCAL_CFLAGS=-DWITH_OPENLDAP -DLDAP_DEPRECATED -I$(LDAP_DIR)/include
 
-DEFAULT_ARGS=--prefix=$(PREFIX) --disable-shared --with-pic
+DEFAULT_ARGS= --prefix=$(PREFIX) --disable-shared --with-pic --disable-slapd
+DEFAULT_ARGS+= --disable-bdb --disable-hdb
 
 LOCAL_LIBADD=$(LDAPLA) $(LIBLBERLA)
 
@@ -16,7 +17,7 @@ include $(switch_srcdir)/build/modmake.rules
 
 $(LDAP_DIR):
 	$(GETLIB) $(LDAP).tar.gz
-	cd $(LDAP_DIR) && ./configure $(DEFAULT_ARGS) --disable-bdb --disable-hdb --disable-slapd
+	cd $(LDAP_DIR) && CFLAGS="`echo $(CFLAGS) | sed -e 's:-std=c99::'`" ./configure $(DEFAULT_ARGS)
 
 $(LDAPLA) $(LIBLBERLA): $(LDAP_DIR)
 	cd $(LDAP_DIR) && $(MAKE)